Patents Assigned to Standard Tube Canada Inc.
  • Method of forming box-section frame members
    Patent number: 4567743
    Abstract: A box-like frame member is formed by deforming the sides of a tubular blank inwardly to provide it with concavely recessed portions in areas corresponding to generally opposing flat surfaces of the product. The deformed blank is expanded, under internally applied fluid pressure, within a sectional die which has its die cavity preferably no more than about 5% larger than the circumference of the blank, to avoid weakening, cracking or yielding of the blank through excessive circumferential expansion.
    Type: Grant
    Filed: March 19, 1985
    Date of Patent: February 4, 1986
    Assignee: Standard Tube Canada Inc.
    Inventor: Ivano G. Cudini